I am trying to run a stress simulation on a hydraulic valve by importing the pressure results from flow simulation. My question is, how do the lids created in the flow simulation affect the analysis? They are are only in the model so that I can specify end conditions for the flow simulation, but if I add them to the part, it will affect the rigidity of the valve body. On the flip side, if I remove them from the simulation, the pressure loads will not have the faces to act against and the pressure from the flow simulation would be pushing against nothing. Can anyone help me with this conundrum?